ance of the ground a few hundred yards to the south of where we had slept, but still at the foot of the cliff. The ground was worn away, it might be by water, it might be by some heavy mass being dragged along it.
It had a curious air of something like regularity, which suggested, and yet which need not suggest, art or design. We saw, however, at once, that it was the termination of a sort of hole in the cliff, apparently coming from above.
As this hole proved to be quite large enough for three or four men to stand up in it abreast, and as the ascent of it seemed not impracticable, we began to think of trying to ascend it.
Jack thought that it might lead us to the top more easily than the surface of the hill. Certainly no part of the cliff, as far as we had seen, seemed at all practicable, but I saw no reason to suspect that we should find a readier passage upward here. Still I agreed with Jack that we might as well try it. I insisted, however, that only one of us should go up, and that the other should await either his return or some signal from the top, if that were possible.
We agreed finally to cast lots to see who should stay behind, and the lot fell upon Jack. I immediately began the ascent, and found it very much easier than